fa Design and optimization of an air-cooled Q-switched Nd:YAG Laser by LASCAD software تخصصی Special پژوهشي Research In this paper we have endeavoured the design of a side pumped air-cooled Q-switched Nd:YAG Laser with uttermost efficiency. In this design has been tried to achieve a maximum and optimum transfer and overlap efficiencies. The diode lasers optimum distance from laser rod center for a maximum absorption has been found 4.85 mm with LASCAD laser software. With scrutiny of different resonator lengths and in the different stability diagram points, the best slope efficiency in the Q-switched mode by producing high overlap efficiency and in the TEMoo mode is reported equal to 10.8%. In this paper we have endeavoured the design of a side pumped air-cooled Q-switched Nd:YAG Laser with uttermost efficiency. In this design has been tried to achieve a maximum and optimum transfer and overlap efficiencies. The diode lasers optimum distance from laser rod center for a maximum absorption has been found 4.85 mm with LASCAD laser software. With scrutiny of different resonator lengths and in the different stability diagram points, the best slope efficiency in the Q-switched mode by producing high overlap efficiency and in the TEMoo mode is reported equal to 10.8%. transfer efficiency, slope efficiency, overlaps efficiency, resonator design, LASCAD software transfer efficiency, slope efficiency, overlaps efficiency, resonator design, LASCAD software 1595 1598 http://opsi.ir/browse.php?a_code=A-10-1-786&slc_lang=fa&sid=1 Amin Hosseini Amin Hosseini Amin101h@yahoo.com 10031947532846003756 10031947532846003756 Yes Malek-ashtar University of Technology Malek-ashtar University of Technology Seyed Ali Yazdani Seyed Ali Yazdani Ay.opto@gmail.com 10031947532846003757 10031947532846003757 No Malek-ashtar University of Technology Malek-ashtar University of Technology abbas maleki abbas maleki ab_maleki56o 10031947532846003758 10031947532846003758 No Malek-ashtar University of Technology Malek-ashtar University of Technology Behnam Abbasi Behnam Abbasi b.abbasi@yahoo.com 10031947532846003759 10031947532846003759 No Malek-ashtar University of Technology Malek-ashtar University of Technology Amir Noferesti Amir Noferesti noferesti@gmail.com 10031947532846003760 10031947532846003760 No Malek-ashtar University of Technology